| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for the reduction treatment of a metal oxide in which metallic zinc in a waste gas can be fully oxidized, and deposits on the inside surface of an exhaustion duct can be reduced. <P>SOLUTION: The method for the reduction treatment of a metal oxide comprises reducing the metal oxide by heating a raw material containing the metal oxide and a reducing agent in a reduction furnace 1, and discharging a waste gas Ge containing metallic zinc vaporized from the raw material from the reduction furnace 1, wherein in order to feed, in the reduction furnace 1, excess oxygen Ga sufficient to perfectly oxidize the metallic zinc vaporized in the reduction furnace 1, the amount of the excess oxygen Ga fed is controlled so that the number of moles of the oxygen in the waste gas Ge is at least twice the number of moles of the metallic zinc vaporized. <P>COPYRIGHT: (C)2013,JPO&INPIT |
